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selftests/bpf: Test bpf_link's get_next_id, get_fd_by_id, and get_obj_info

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Extend bpf_obj_id selftest to verify bpf_link's observability APIs.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200429001614.1544-7-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
2020-04-28 17:16:10 -07:00
committed by Alexei Starovoitov
parent 0dbc866832
commit 2c2837b09e
2 changed files with 104 additions and 20 deletions
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14
tools/testing/selftests/bpf/progs/test_obj_id.c
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@@ -3,16 +3,8 @@
*/
#include <stddef.h>
#include <linux/bpf.h>
#include <linux/pkt_cls.h>
#include <bpf/bpf_helpers.h>
/* It is a dumb bpf program such that it must have no
* issue to be loaded since testing the verifier is
* not the focus here.
*/
int _version SEC("version") = 1;
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 1);
@@ -20,13 +12,13 @@ struct {
__type(value, __u64);
} test_map_id SEC(".maps");
SEC("test_obj_id_dummy")
int test_obj_id(struct __sk_buff *skb)
SEC("raw_tp/sys_enter")
int test_obj_id(void *ctx)
{
__u32 key = 0;
__u64 *value;
value = bpf_map_lookup_elem(&test_map_id, &key);
return TC_ACT_OK;
return 0;
}